So this is my first build plz be nice.
So I love to jungle it is always helpful to have a jungler.

PROS
good ganker
jungling keeps you at the same lvl and lets 2 people get higher lvls than usual

CONS
very squishy at start
enemy team may find you jungling

I don't really use runes that much so go with anything. I just like cooldown reduction.

IT IS VERY IMPORTANT TO HAVE THE MASTERY AWARENESS SO YOU CAN GET THE LVL UP AT THE LITTLE GOLEMS
Other than that you can kinda go how you like because this is not what you HAVE to do just a suggestion.

So I go for the 2 little golems (use smite) first so i get a lvl up. Then I go to the witches (use heal[summoner spell]). Then the wolves (use smite and heal potion). Then I go into the enemy forest and kill their golems. Then I go and get the witches(use smite). Then go teleport back home(hotkey b). Then at home get Madred's Razors. Go kill the 2 little golems. Then the witches. Then the Lizard King(use smite). Then the wolves. Then the big golem with the blue buff. Then I usually go home and heal (buy boots if you have enough money). Then go kill the dragon (If you want a friend to help thats ok because its all up to chance with Madred's Razor)
By now you should be lvl 6 and should go out ganking. :D

Madred's Razor is good for jungling and goes into the bloodrazors so its a good item.
I chose those boots because they give some attack speed which is nice but you can go with any boots you want.
So you may be saying but the ult is very good with high damage.
Then Guardian Angel because if you die you come back and finish the fight.

So for skills Hungering Strike is very nice to keep you alive when jungling. It also get running away enemys and may save your life when you are running away.
Hunters Call is good when fighting enemy hero's or pushing lanes.
Blood scent is good for chasing enemy hero's or running away from low life hero's. It also has a very good range and gives you vision of then so you know were they are and can gank them.
Now Infinite Duress is good i use it to start ganks and also stunning enemy hero's in the twerps range.

Again please be nice. This is my first build. Any comments would be nice just don't be rude this should be a friendly environment.